1001121112220 has 24 divisors (see below), whose sum is σ = 2123169729408. Its totient is φ = 396483608000.

The previous prime is 1001121112219. The next prime is 1001121112261. The reversal of 1001121112220 is 222111211001.

It is a junction number, because it is equal to n+sod(n) for n = 1001121112195 and 1001121112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247800236 + ... + 247804275.

It is an arithmetic number, because the mean of its divisors is an integer number (88465405392).

Almost surely, 2^{1001121112220} is an apocalyptic number.

1001121112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001121112220 is an abundant number, since it is smaller than the sum of its proper divisors (1122048617188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001121112220 is a wasteful number, since it uses less digits than its factorization.

1001121112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495604621 (or 495604619 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1001121112220 its reverse (222111211001), we get a palindrome (1223232323221).

The spelling of 1001121112220 in words is "one trillion, one billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty".